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Патент USA US2105328

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Jan. 11, 1938.
F. R. MOLITOR
2,105,328
RECIPROCATING BED MOTiON FOR FLAT BED PRESSES
Filed Dec. 50, 1936
WITNESSES
INVENTOR
) I Fr-eclerickJLJYloZii'Or’
‘ /'L] BY
Patented Jan. 11, 1938
'
'
' 2,105,328
NlTEDv STATES
PATENT OFFICE
2,105,328
RECIPROOATING BED MOTION FOR FLAT
BED PRESSES
Frederick R. Molitor, New York, N. Y.
Application December 30, 1936, Serial No. 118,287
3 Claims. (Ol. 101-282)
This invention relates to printing presses, and ley I6 accommodates the driving belt I"! passing
particularly to a reciprocating bed motion for .over the small pulley l8 driven by the prime
ilat bed presses, the object being to provide an mover IS. The prime mover I9 is usually an
improved simpli?ed construction of means for
5 moving the bed and associated parts.
Another object of the invention is to provide
a reciprocating bed motion which permits an im
» pression to be made upon each complete revolu~
tion of the impression cylinder.
10
A further object,‘ more speci?cally, is to pro
vide a reciprocating motion for ?at bed presses
wherein the impression cylinder and the bed are
so intergeared that the bed will move on its for
ward stroke during the ?rst half of the revolu
15 tion of the impression cylinder and will move on
the return stroke upon the second half of the
revolution of the impression cylinder.
In the accompanying drawing:
Fig. 1 is a fragmentary side elevation illustrat
20 ing an embodiment of the invention;
Fig. 2 is a fragmentary sectional view through
Fig. 1 approximately on the line 2—2;
Fig. 3 is a fragmentary sectional view through
Fig. 1 approximately on the line 3—3, the same
25 being on a slightly enlarged scale.
Referring to the accompanying drawing by
numerals, | indicates a frame of a ?at bed press.
This press may be of any desired type, as for
instance of the type known as the Miehle flat bed
30 printing machine. This machine is provided
with a bed 2 of the usual kind and an impres
sion roll 3 of the usual kind. It will be under
stood that paper sheets are fed to the machine
in the usual way and as the bed 2 reciprocates
35 the sheets will be printed upon successively. The
bed 2 may be supported and guided by suitable
members 4 and has a rack 5 rigidly secured there
to, preferably on the under surface.
A bed gear wheel 6 continually meshes with
40 rack 5 and acts as means for moving the rack.
Gear wheel 6 is keyed or otherwise rigidly secured
to shaft 1, to which is keyed or otherwise secured
a pinion 8. A comparatively large loose gear
Wheel 9 is mounted on the shaft 1 and is rotat
45 ably mounted between pinion 8 and abutment Ill.
The loose gear wheel 9 continually meshes with
the roller gear H which is connected through
electric motor and acts to provide power for driv
ing the various parts just described. It will be
observed that when the motor I9 is functioning
the various gear Wheels just described will be
rotating. As the pinion l3 rotates it will natu
rally move the wrist pin 20 in a circle. Wrist
pin 20 is rotatably mounted in a link 2| which 10
is pivotally connected at 22 to an arm 23. Arm
23 is rigidly secured to a hollow shaft 24 as
shown in Fig. 3. A second arm 25 is also rigidly
secured to hollow shaft 24 so that the arms 23
and 25 will move in unison. These arms are each 15
provided with a slot 26 through which the re
spective pins 2'! and 28 extend. These respec—
tive pins are adapted to be clamped tightly to
the respective arms, while allowing the respec
tive links 2| and 29 to freely swing.
20
Link 29 is connected through a journal pin 30
to the arm 3|. Journal pin 30 also extends
through the power link 32 so that when the arm
3| swings, power link 32 will be reciprocated.
It will be understood that the pin 30 is similar to 25
the pin 28 and is rigidly clamped to the arm 3|
in a slot 33, while at the same time allowing a
proper swinging movement of links 29 and 32.
The power link 32 is pivotally connected at 34
to a rack 35 which is continually in mesh with 30
the pinion 8, whereby said pinion is moved back
and forth as link 32 functions. Rack 35 is pro
vided with an arm 36 which is preferably integral
therewith, said arm being journaled on the hol
low shaft 24 as shown in Fig. 3.
35
A standard 31 is carried by frame I and rigidly
secured thereto in any desired manner, said
standard accommodating the pin 38 as shown in
Fig. 3, said pin being rigidly secured to the stand
ard by the set screw 39. Standard 40 supports 40
the pin 4| in a similar manner to that shown in
Fig. 3. Arm 3| is loosely mounted on pin 4| so
as to readily swing. The various slots 42, 26 and
33 permit a desired adjustment of the respective
parts so that a proper action is secured.
A rod 45
tate therewith.
As shown in Fig. 1, a driving pinion |4 con
tinually meshes with the loose gear 9, said pin~
43 is pivotally connected at 44 to arm 36 and
loosely passes through an abutment 45. A spring
46 acts against abutment 45 and a stop 47.
Spring 46 is under tension at all times and tends
to balance the weight of the respective parts 50
while at the same time giving a slight tendency
to rack 35 to move from the position shown in
Fig. 1 to the left.
ion being rigidly connected with shaft I5, to
65 which a pulley I6 is also rigidly secured. Pul
By reason of the construction just described,
when the motor I9 is functioning the various 55
shaft l2 with the impression drum 3 so as to ro
tate therewith. A driving disk I3 is also keyed or
50 otherwise rigidly secured to shaft l2 so as to ro
2
‘2,105,328
parts will also function and cause the bed 21 to
reciprocate, while the impression cylinder 3 ro
tates always in the same direction. , For the ?rst
half of‘ the rotation of the impression cylinder
3, bed 2 will move forward to its extreme posi
3. The combination with a ?at bed press hav
ing an impression cylinder and a reciprocating
bed, of means for causing said bed to have one
complete cycle of action upon one revolution of
said cylinder, said means including a’ rack se
tion, and then on the second half or completion
oif the rotation, bed 2 will move back to its ?rst
or starting position. It will therefore be seen
cured to said bed, a primary gear wheel secured
to said cylinder, an idler gear continually mesh
ing with said primary gear wheel, a pinion con
that upon each revolution of the impression cyl
tinually meshing with said idler gear, power
means for rotating said pinion, a rack actuating 10
gear continually meshing with said rack, a pinion
rigidly connected with said rack actuating gear,
a segmental rack continually meshing with said
10 inder, one sheet of paper is printed. ‘
I claim:
1. A reciprocating bed motion for ?at bed
presses including a rack secured to the bed of
the press, a gear wheel continually meshing with
15 said rack, means for driving said gear Wheel;v
means actuated by the impression cylinder. of
second-‘mentioned pinion, said segmental rack
having an arm extending normal thereto, means
at the outer end of said arm for pivotally sup
the press for actuating said means, and a spring porting the arm so that said segmental rack will
member cushioning the motion of said means.
continually mesh with said second~mentioned
2.'In a flat bed printing press having a re
pinion, a substantially reciprocating link having ,
ciprocating bed and a rotatable impression cylin one end pivotally connected to said cylinder so
der, means actuated by said cylinder to cause that as said cylinder rotates said link will re
rsaidlbed to function, said means including a disk , ciprocate,.a power link having one end pivotally
secured'to said cylinder so as to rotate therewith,
a journal pin carried by said disk and positioned
'to'move in a circle when said disk rotates, a
substantially reciprocating link'having one end
journaled on said pin, a segmental rack provided
with an arm extending normal thereto, means for
pivotally mounting the free end of said arm, link
mechanism connected to one-end of said link
and to one end of said segmental rack for re
ciprocating said rack, a pinion continually mesh
ing with said segmental rack, a bed rack secured
- to said bed, and a gear wheel-rigidly‘ secured to
said pinion for meshing with said bed rack.
secured to said segmental'rack near one end,
an arm having one end pivotally connected to 25
the outer end of said power link and the oppo
site end pivotally mounted in a fixed position,
and means forconnecting the outer end of ,said,,
reciprocating link with the joint, of said power
link and said arm so that as said reciprocating Y
link functions motion will be' transmitted
through said power link to saidsegmental rack
for reciprocating the same.
'
FREDERICK R. MOLITOR.
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